I'm wanting to ditch my OLD low hanging headers, are these manifolds worth it?

I did the same thing on my 360. Got rid of the ground dragging hooker headers. Took them off with a sawzall and enjoyed it. Replaced them with a set of 72 340 manifolds. They are much cheaper than the 68-70. Bought a dual exhaust from Waldron, pretty reasonable. You have to match the head pipes to the manifolds. Turned out great.